[@Cyclone]Reathos could make the Redeads -- or an order that hunts them.

Julkofyr could have a hand in twisting the Twili.

Daegon the Gerudo.

Zephyrion would have a hand in transforming the Zora into the Ruto.

Vestec would provide the more...interesting enemies, I'm sure. Wallmasters sound like his thing.

Niciel would guide Zelda and Midna. Astarte would probably be goddess of the faeries.

I'm about 99% certain that Ganondorf would be a hero of Mammon. Zant too, possibly. The whole Twili origin story reeks of the Adversary.